Jennifer Aniston flaunts her huge diamond engagement ring. (Photo : Reuters)

Jennifer Aniston's time at the gym has been well-spent; the actress needs the strength to carry that huge rock of an engagement ring on her finger.

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Aniston, 43, revealed her engagement to Justin Theroux, 41,in August but kept the ring hidden from the public until now. The actress flaunted her enormous diamond on Saturday while she and her fiance engaged in some PDA during an outing.  The couple was spotted out and about in Santa Fe.  Aniston is taking a break from her latest film "We're the Millers," which has been filming in Albuquerque.  Theroux flew in to visit his fiancé. The pair looked very casual wearing jeans, leather jackets, scarves, and sunglasses.

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The couple looks very happy in New Mexico and are said to be considering it as their wedding location. According to OK! Magazine, "Jen has fallen in love with New Mexico, it has a very relaxed vibe that fits both her and Justin perfectly, so it would be a great place for them to have the wedding."

In the photos, Aniston is seen gently holding Theroux's face as he smiled at his wife-to-be.  The actor popped the question in NYC at his birthday bash. "Everyone is really excited for them," a source told People. "It's amazing to see how happy Justin makes Jen, and everyone was always hoping that he would propose."

Aniston and Theroux have been dating over a year since filming their 2012 comedy, "Wanderlust."

SEE THE RING HERE